The 1949–1951 Ford Wagon SuperSlide Multi-Leaf Rear Drop Leaf Springs (Pair) by Posies (Part #312) is a specialized 3" rear lowering spring set designed specifically for the unique rear axle weight and load requirements of iconic 1949, 1950, and 1951 Ford "Shoebox" Station Wagons and Woodies.
Engineered as a direct bolt-in replacement for worn or high-riding factory wagon spring packs, this kit lowers the vehicle's rear profile by 3 inches while providing the additional spring rate necessary to support heavy wagon bodies.
Product Overview & Performance
Station wagons and Woody models feature significantly higher rear axle curb weights compared to standard Shoebox coupes and sedans. Standard passenger car lowering springs are often under-rated for wagon rear ends, resulting in bottoming out or rear sag. Posies #312 springs feature an increased spring rate tailored to wagon loads, maintaining proper suspension travel, controlled damping, and payload capability at a lowered height.
Each spring pack incorporates Posies' signature moly-nylon SuperSlide inter-leaf buttons embedded between leaf tips. This eliminates leaf-on-leaf friction, binding, rust, and squeaks, delivering a smooth, compliant ride without sacrificing load capacity.
Key Features & Design Highlights
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3" Custom Lowered Stance: Drops the rear chassis 3 inches below original stock height for a level, sleek stance on custom wagons and Woodies.
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Wagon-Specific Spring Rate: Specially spring-rated to handle the extra body and tailgate weight unique to 1949–1951 Ford station wagons.
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Direct Chassis Bolt-In: Mounts directly into factory front frame hangers and rear shackle locations without cutting or frame modification.
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SuperSlide Inter-Leaf Damping: Moly-Nylon buttons prevent steel-on-steel friction for a quieter, softer ride over bumps.
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Pre-Installed Front Eye Bushings: Ships with pre-pressed front spring eye bushings to streamline chassis assembly.
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American-Made Quality: Hand-assembled and tour-tested in the USA using premium tempered spring steel with proven 100,000+ mile reliability.
Technical Specification Matrix
| Feature / Metric |
Technical Specification Detail |
| Manufacturer & Part # |
Posies Rods & Customs (P/N: 312) |
| Vehicle Application |
1949, 1950, and 1951 Ford Station Wagons & Woodies |
| Stance Drop |
3.0" Lowered Rear Stance |
| Spring Capacity |
Heavy-Duty Spring Rate (Wagon/Woody Specific) |
| Inter-Leaf Damping |
Moly-Nylon SuperSlide Friction-Reduction Buttons |
| Included Components |
Sold as Pair; Pre-Installed Front Spring Eye Bushings |
| Package Weight & Size |
Approx. 78.0 lbs per Pair (50.00" L x 9.00" W x 5.00" H) |
Installation Notes & Recommendations
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Associated Chassis Hardware: To complete installation safely, replacing old hardware with Posies' dedicated 1949–1951 Ford replacement front eye bolt kits and rear shackles is strongly recommended.
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Drivetrain Alignment: When lowering a station wagon by 3", check drive shaft u-joint working angles to confirm proper pinion angle alignment.
